[data-theme="light"] 
body {
  background: linear-gradient(-45deg, #fbede8, #b4cef7, #b7f9b8, #f6ced8);
  background-size: 400% 400%;

  height: 100vh;
  background-attachment:fixed;
}    


[data-theme="dark"]
body {
  background: linear-gradient(-45deg, #6f1b01, #113878, #016801, #540818);
  background-size: 400% 400%;

  height: 100vh;
  background-attachment:fixed;
}    